UnixHTTPConnectionPool(host='localhost', port=None): Pool is closed. On compose build

[hostmit]

I'm hitting this error while building in parallel 12 services (6 concurrent, IO intensive build on SSD compute instance). Happens occasionally but it does.

ERROR: for Dashbrd  UnixHTTPConnectionPool(host='localhost', port=None): Pool is closed.
Couldn't connect to Docker daemon at http+docker://localhost - is it running?
If it's at a non-standard location, specify the URL with the DOCKER_HOST environment variable.

Retrying same build helps. I looked through the daemon log - no visible errors found.

Docker version 19.03.5, build 633a0ea838
docker-compose version 1.24.1, build 4667896b

I've increased COMPOSE_HTTP_TIMEOUT, but I dont think that's the problem.

The strange thing is I get the same behavior while building under DIND.

Any solution known in 2020?

[isushilksharma]

Same error - ERROR: for robo-nsecom-jacoco_kafka_1 UnixHTTPConnectionPool(host='localhost', port=None): Read timed out. (read timeout=120)

Though I've used below -

export DOCKER_CLIENT_TIMEOUT=120
export COMPOSE_HTTP_TIMEOUT=120

But it didn't worked at all -
Restarted docker/ docker daemon but nothing positive happened, let here know if there's any possible solution.

[isushilksharma]

It got resolved, after restarting docker.
Sometimes, you;ve to restart services - seems it's a docker-compose issue.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it had not recent activity during the stale period.

[karniemi]

This "Pool is closed." is still an issue, at least on RHEL7 ie. docker-compose.noarch:1.18.0-4.el7 from the epel-repository.
( @isushilksharma's "Read timed out." issue is different )